Improving the Thermosphere Ionosphere in a Whole Atmosphere Model by Assimilating GOLD Disk Temperatures

Global-Scale Observations of Limb and Disk (GOLD) disk measurements far ultraviolet molecular nitrogen band emissions are used to retrieve column integrated temperatures (Tdisk), which representative the lower-and-middle thermosphere. The present work develops a new approach assimilate Tdisk in whole atmosphere community climate model with thermosphere-ionosphere eXtension using data assimilation research testbed ensemble adjustment Kalman filter. Nine days data, 1–9 November 2018, assimilated. Analysis state variables such as thermospheric effective temperature (Teff, airglow layer temperature), ratio atomic oxygen densities (O/N2), electron content compared control simulation that is only constrained up ∼50 km. It observed GOLD improves analysis states when simulation. states, particularly, Teff, O/N2, density (ECD) their measurement counterparts for validation assimilation. Teff O/N2 O/N2. While, ECD ground based total from global navigational satellite system receivers. Root mean square error (RMSE) improvements about 10.8% 22.6%, respectively. RMSE improvement analyses 10%